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Finding the Fourth Proportional to 15,391, 23,058.15 and 13,730.64

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Solution

The fourth proportional to 15,391, 23,058.15 and 13,730.64 is: 20,570.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,391 : 23,058.15 = 13,730.64 : x
  2. Step 2: Convert to fraction form
    15,391/23,058.15 = 13,730.64/x
  3. Step 3: Cross multiply
    15,391x = 23,058.15 × 13,730.64
  4. Step 4: Simplify right side
    15,391x = 316,603,041.43
  5. Step 5: Solve for x
    x = 316,603,041.43/15,391
  6. Step 6: Final answer
    x = 20,570.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.